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| Property | Parameter | Description |
|---|---|---|
| Product Name | Galvanized Steel for Outdoor Construction | Hot-dip or electro-galvanized steel products designed for exterior structural and architectural applications |
| Material Grade | DX51D / S250GD / S350GD (EN); ASTM A653 CS / SS Grade 33–80; GB/T 2518 DC51D+Z | Equivalent international grades: JIS G3302 SGCC / SGCH; structural grades available up to 550 MPa yield |
| Standard Compliance | ASTM A653/A653M; EN 10346:2015; JIS G3302; GB/T 2518-2019 | Meets international hot-dip galvanized flat steel standards for structural and general commercial use |
| Chemical Composition | C ≤ 0.12%; Mn ≤ 0.60%; P ≤ 0.10%; S ≤ 0.045%; Si ≤ 0.50%; Al ≥ 0.01% | Low-carbon steel base; zinc coating alloy may include Al (0.2–0.5%) and Mg for enhanced corrosion resistance |
| Tensile Strength | 270–560 MPa (grade dependent) | CS Type B (ASTM A653): ≥270 MPa; S350GD (EN 10346): ≥420 MPa; higher grades available for structural use |
| Yield Strength | 140–480 MPa | SS Grade 33: ≥230 MPa; S350GD: ≥350 MPa; S550GD: ≥550 MPa per EN 10346 |
| Elongation | ≥10%–30% (A80 or A50) | Varies by grade; DX51D: ≥22% (A80); structural grades (S350GD): ≥12% (A80) per EN 10346 |
| Zinc Coating Weight | Z60–Z600 (g/m²); G30–G235 (oz/ft²) | Common outdoor grades: Z275 (275 g/m² total both sides); Z350–Z600 for heavy-duty marine/industrial environments |
| Coating Type | Hot-Dip Galvanized (HDG); Electro-Galvanized (EG); Galvalume (ZA / AZ) | HDG preferred for outdoor construction; Galvalume (55% Al-Zn) offers superior heat and corrosion resistance |
| Thickness Range | 0.12–6.0 mm | Standard sheet/coil thickness; structural profiles and plates up to 12 mm available on request |
| Width Range | 600–1,500 mm (coil); up to 2,000 mm (sheet) | Custom slit widths available; standard coil OD: 508–610 mm inner diameter |
| Surface Finish | Regular Spangle / Minimized Spangle / Zero Spangle; Skin-passed; Chromate / Phosphate passivation | Zero spangle recommended for painted outdoor applications; oiled or dry surface per customer requirement |
| Application | Roofing, wall cladding, structural framing, purlins, fencing, highway guardrails, outdoor furniture, agricultural buildings | Widely used in construction, infrastructure, and industrial outdoor environments requiring long-term corrosion protection |
| Certification | ISO 9001:2015; CE Marking (EN 10346); Mill Test Certificate (EN 10204 3.1/3.2); RoHS Compliant | Third-party inspection available (SGS, BV, TÜV); ASTM certified test reports provided upon request |
| Packaging | Coil: steel-strapped, waterproof paper + steel outer wrap; Sheet/Plate: wooden pallet with steel banding | Export seaworthy packaging standard; coil weight typically 3–10 MT; inner sleeve protection included |
| MOQ | 25 MT per order (coil); 5 MT (cut-to-length sheet) | Mixed grades and specifications accepted within one order; sample coils available for qualification testing |
Initial coil width variance issue — resolved satisfactorily
Our first order of Z180 galvanized coils, 0.8 mm × 1,250 mm, for industrial shed roofing showed width variance of up to 4 mm on several coils in the first shipment, which caused fitment issues on our roll-forming line. We raised this with the supplier immediately. They investigated promptly, confirmed a slitting calibration issue, and reshipped replacement coils within 10 days at no additional cost. The replacement material measured within ±1 mm tolerance consistently. Communication throughout was professional. We have since placed a second order and the quality control has been correct. Cautiously optimistic going forward.
Our first order of Z180 galvanized coils, 0.8 mm × 1,250 mm, for industrial shed roofing showed width variance of up to 4 mm on several coils in the first shipment, which caused fitment issues on our roll-forming line. We raised this with the supplier immediately. They investigated promptly, confirmed a slitting calibration issue, and reshipped replacement coils within 10 days at no additional cost. The replacement material measured within ±1 mm tolerance consistently. Communication throughout was professional. We have since placed a second order and the quality control has been correct. Cautiously optimistic going forward.
